Teledyne API Model 401 O
3
Photometric Calibrator Instruction Manual, 01124, Rev. J1
2.1.5 Data Acquisition
The Teledyne API Photometric Calibrator contains a built-in data acquisition system which
keeps track of the average O
3
readings and the last 100 averages. This data is made available to
other systems via the RS-232 interface. The Photometric Calibrator can be programmed to
automatically output a 1 minute to 60 minute average. The last 100 averages can be called up
through the remote
RS-232 I/O or viewed on the display through keyboard call-up.
2.1.6 RS-232 Interface
The Teledyne API Photometric Calibrator features an optional RS-232 interface which can
output the instantaneous and/or average O
3
data to another computer. It can also be used as a
command and status channel to allow another computer to control the Analyzer. Refer to Figure
1-4 for details on using the RS-232 interface.
2.1.7 Password Protection
The Teledyne API Photometric Calibrator provides password protection of the calibration and
setup functions to prevent incorrect adjustments to the Calibrator. There are three levels of
passwords which correspond to operator, supervisor/maintenance, and dynamic span level
functions. When prompted for a password, any of the valid passwords can be entered, but the
CPU will limit access to the functions allowed for that password level. Each level allows access
to the functions of all the levels below plus some additional functions. The table on the following
page lists the password levels and the functions allowed for each level.
2-2
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